$ git clone -n https://src.fedoraproject.org/rpms/rust-pcre2.git /var/lib/mock/f40-build-2170240-51015/root/chroot_tmpdir/scmroot/rust-pcre2
Cloning into '/var/lib/mock/f40-build-2170240-51015/root/chroot_tmpdir/scmroot/rust-pcre2'...
$ git fetch origin 8e213761a80f919fa627ed8ffa422390b041da10:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pcre2
 * [new ref]         8e213761a80f919fa627ed8ffa422390b041da10 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8e21376 Update to version 0.2.6; Fixes RHBZ#2251590