$ git clone -n https://src.fedoraproject.org/rpms/rust-paste.git /var/lib/mock/f45-build-43749-805/root/chroot_tmpdir/scmroot/rust-paste
Cloning into '/var/lib/mock/f45-build-43749-805/root/chroot_tmpdir/scmroot/rust-paste'...
$ git fetch origin 41b41caaebefb9183859062ba501743a1f3cde39:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-paste
 * [new ref]         41b41caaebefb9183859062ba501743a1f3cde39 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 41b41ca Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild