$ git clone -n https://src.fedoraproject.org/rpms/bitcoin-core.git /var/lib/mock/f40-build-2274612-55018/root/chroot_tmpdir/scmroot/bitcoin-core
Cloning into '/var/lib/mock/f40-build-2274612-55018/root/chroot_tmpdir/scmroot/bitcoin-core'...
$ git fetch origin 20b3d4142709cd8abe0a4535b9ed540ee208bed8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bitcoin-core
 * [new ref]         20b3d4142709cd8abe0a4535b9ed540ee208bed8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20b3d41 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild