$ git clone -n https://src.fedoraproject.org/rpms/bitcoin-core.git /var/lib/mock/f38-build-side-42-init-devel-888447-28506/root/chroot_tmpdir/scmroot/bitcoin-core
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-888447-28506/root/chroot_tmpdir/scmroot/bitcoin-core'...
$ git fetch origin 934171a33adde1b5968daec9a60b1516111b150a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bitcoin-core
 * [new ref]         934171a33adde1b5968daec9a60b1516111b150a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 934171a Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild